31220440042300 has 18 divisors (see below), whose sum is σ = 67748354892008. Its totient is φ = 12488176016880.

The previous prime is 31220440042279. The next prime is 31220440042333. The reversal of 31220440042300 is 324004402213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156102200112 + ... + 156102200311.

Almost surely, 2^{31220440042300} is an apocalyptic number.

It is an amenable number.

31220440042300 is an abundant number, since it is smaller than the sum of its proper divisors (36527914849708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220440042300 is a wasteful number, since it uses less digits than its factorization.

31220440042300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312204400437 (or 312204400430 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 31220440042300 its reverse (324004402213), we get a palindrome (31544444444513).

The spelling of 31220440042300 in words is "thirty-one trillion, two hundred twenty billion, four hundred forty million, forty-two thousand, three hundred".